Animal drinking fountain



FIG. 1 is a front elevational view of an animal drinking fountain showing my new design, the rear being the same as the front side shown;

FIG. 2 is a side elevational view thereof, the opposite side being the same as the side shown;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a partial cutaway side elevational view thereof. 

The ornamental design for a animal drinking fountain, as shown and described. 